1 7. Let the coefficients of x and x3 in the expansion of 2x5 8. , x>0, bem and n respectively. If r is a positive integer such that mn = 15 Cr. 2', then the value of r is equal to...... The total number of four digit numbers such that each of first three digits is divisible by the last digit, is equal to.......... 0 - 9. Let M= 0 10. 49 where a is a non-zero real number an N = MK. If (I M)N = 21, then the positive integral value of a is........ k=1 Let f(x) and g(x) be two real polynomials of degree 2 and 1 respectively. If f(g(x))=8x -2x, and g(f(x))=4x+6x+1, then the value of f(2) + g(2) ......