Question

Write the first four triangular no

Answer 1

hay!!

Dear friend

write the first four triangular no

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Here is ur answer


If we add this dot we get our answer

so,

First triangular number is 1

and second triangular number is 1+2=>3

And third triangular number is 1+2+3 => 3+3=>6

and four triangular number is 1+2+3+4
=> 3+3+4
=>6+4
=> 10

if you can't understand then check the attachment

I hope it's help you