Question

1!+2!+3!+.......150!,divided by 15 .what will be the reminder

Answer 1

first we have to find the nth term. ..
a+(n-1)d = 150
=> 1 + (n - 1)(1) = 150
=>n = 150 ...

so the sum of nth term...

sum = n/2 [ a + l ] ( l = last term of AP)
sum = 150/2 [1+ 150]
sum = 75 × 151
sum = 11325....

so if we will divide it by 15...

= 11325 / 15
=755...

here is ur answer friend...
mark as brainliest if it helps u

Answer 2

Hey folk...

Just go through the following attachment ..
In case any doubt comment over here

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Thank you
HOPE IT HELPS...!