?

Say you have a file variable foo in a directory, and you want to know if, say, foo.c was also in that directory?

Similarly, if you have a file variable foo.o in a directory, and you want to know if foo.s is also in that directory, how would you do it?

I've already got a for loop that goes through the files in the directory, but I can't work out an if statement condition to check for files where the names are composed of a variable and a string suffix.

Thanks in advance!

How are data spread over an array if the number of data does not divide by the number of writeable discs? For example, if you have a RAID5 array, there are 3 writable discs. What do you do if the quantity of data you have is not a multiple of three? Thanks in advance.

'Show that if lines r1 and r2 intersect then:

v.(bxu) = v.(axu)

where

r1 = a + ku

and

r2 = b + hv'

Is it something to do with the fact that if they intersect they will be coplanar? I'm so stuck.

Thanks in advance =)

'By using the identity 2^x = e^(xln2), obtain the first three terms in the expansion of 2^x as a series of ascending powers of x, up to and including x^2'.

The answer is 1 + xln2 + (1/2)((ln2)^2)(x^2)

Can someone please show the steps to this answer?

(Sorry it's hard to write algebra simply with a keyboard!)

'The roots of cubic equation 2x^3 + 3x + 4 = 0 are a, b, and c.

Find the cubic equation, with integer coefficients, having roots ab, bc, and ac.'

I'm so stuck! Thanks in advance.

I know there's a formula with a 2 at the front for the integral of f'(x)/[(sqrt) f(x)] but I can't remember it!

Thanks.

In other words, how do you integrate the square root of (1 + cosx)?

Thanks

Trying to check my credit, and I need to 'press 1' in call but I have no keypad to do so. Help!