Question

kisi Ap ke pratham or antim pad kramash 17 or 350 hai yadi sarv antar 9hai to isme kitne pad hai or inka yog kya hai​

Answer 1

Answer:

tn=a+(n-1)d

here tn=350 ,a=17,d=9 given

so,350=17+(n-1)9

333÷9=n-1

n=38 answer

n is terms;

for sum we apply Sn=[n{2a+(n-1)d}÷2]

so by putting all values of n,a,d we get Sn

Sn=6973 by solving above equation

Explanation:

we also use shortcut for finding sum by adding first and last term then multiply with no. of terms then divide it by 2 we get the value

350+17=367

367×38=13946

13946/2=6973

here is the answer Sn=6973