99+95+91+,,,,,,,,+20 के पदों का योग ज्ञात करें
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kya kya kua kya kya samath ni aya xd
Answered by
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Answer:
305
Step-by-step explanation:
(1+2+3+....+99)-(1+2+3+...+19)
Putting formula for adding the numbers when they are in serials i.e. {n×(n+1)}/2 where n represents no. of terms.
= {99×(99+1)}/2 - { 19×(19+1)}/2
= (99 × 100)/2 - (19×20)/2
= 4950-190
= 4760
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