Find27-2312equal to
Given 27-2312
27-2312=27-23×12=27-13=12713=13313∵Thecuberootof27is3=13
∴27-2312=13
If f=x1+x2+13(x1+x2)3+15(x1+x2)5+... to ∞ and g=x−23x3+15x5+17x7−29x9+..., then f=d×g. Find 4d.
loge(n+1)−loge(n−1)=4a[(1n)+(13n3)+(15n5)+...∞] Find 8a.